Saturday, 10 December 2016

terminology - Lenses and Filters: what do the terms Coating, Multi-Coating and Nano-Coating mean?



I see the word "Coating" in different questions (related to lenses and filters). What are Coating, Multi-Coating, and Nano-Coating?



Answer



Coatings are just special chemical compounds that are applied to the surface of glass filters and lens elements in order to change their optical properties usually in order to reduce reflections and other unwanted effects, as well as repealing water and grease, and providing resistance to scratches.


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